Self-cleaning pipe



June 1 1926.

- L. STERN SELF CLEANING PIPE Filed July 14, 1924 @M BY I ORNEY PatentedJune 1, 1926.

I-UDWIG STERN, on NEW YORK, n. Y.

SELF-CLEANING PIPE.

Application filed July 14, 1924. Serial No. 725,794.

The object of my invention is to provide a pipe which may be easilycleaned from time to time, as desired, and which will prevent nice orsaliva from entering the mouth of the vsmoker when the pipe is in use.This and other objects are accomplished'by my invention, one embodimentof which is hereinafter more particularly set forth.

For a more detailed description of my invention, reference is to be hadto the accompanying drawings, forming a part hereof, in which- Figure 1is a side elevation, partially in section, of a pipe with amber orbakelite mouthpiece embodying my invention.

Figure 2 shows a mouthpiece of the same.

Figure 3 a socket into which a projection from the mouthpiece extends.

Figures 4 and 5 are sectional views, taken on the lines 44 and 55 ofFigure 1, looking in the direction of the arrows.

Figure 6 is a side elevation, partially in section, of an ordinary pipeembodying my invention. 'lhroughout the. various views of the drawings,similar reference characters designate similar parts.

My improved pipe 1 has a bowl 2, a stem 3 and a mouthpiece 4. The bowlneeds no description because it is a conventional bowl, such as iscommonly used in smokers pipes. The stem does differ from ordinary pipesin this respect. A boss 5 is set in the stem, this boss being made ofany suitable material, as aluminum, and it has a cylindrical bore on itsinterior and an end perforated at 6 so as to register with the vent ofthe pipe. This socket or boss 5 is made large enough to receive aprojection 7 which extends from the mouthpiece 4. If the mouthpiece bemade of amber or similar material, as shown in Figure 1, this projection7, which is preferably made of aluminum, is reduced at its end and screwthreaded at 8 so as to fit into the mouthpiece and be held therein, asis obvious, and it is also screw threaded at 9 to engage similar threadsin the socket 5 by which it is held firmly in place. The projection 7has a head which nearly fills the interior of the socket 5, but has arecesslO in this head and in the upper portion thereof so that smoke maybe drawn through this opening in the conventional manner and alsothrough a passage 11 at the rear of this projection which passageregisters with a corresponding passage 12 in the mouthpiece 4. It willbe noted that back of the head there is a reduced neck or stem in theprojection 7 around which saliva or other fluids are trapped as thepassage 11 emerges near the top of the bore in the socket 5.

When the pipe is to be cleaned the mouthpiece is unscrewed in theconventional manner and then the projection 7 pulled longitudinallythrough the bore of the nonabsorbent socket 5 so that all impurities arescraped out and thereafter the stem 7 may be wiped clean and reinserted.In this very simple manner the pipe may be kept clean with very littleeffort and it is practically self-cleaning whenever the mouth piece isdetached, as described above. the preferred embodiment of my invention,the socket 5 preferably has roughened or knurled cylindrical surfaces 13so as to prevent the same from turning in the stem 3.

The structure shown in Figure 6 is the same as that shown in Figure 1except that. the threads 9 are not used and the mouthpiece i'has areduced end 14 which slides directly into the socket 5 and slides outwithout the assistance of screw threads. This structure may be usedwhere ordinary mouthpieces are employed.

While I have shown and described two embodiments of my invention, it isobvious that it is not restricted thereto, but that it is broad enoughto cover all structures that come within the scope of the annexed claim.

Having thus described my invention, what I claim is:

In a pipe of the class described, a bowl, a stem and a mouthpiece, thestem having a socket secured therein with a roughened exterior surface,with a passage connecting the bore of the stem to the bowl of the pipeand the mouthpiece having a projection with a head adapted to scrape thesocket and keep the same clean, the head having a bore through whichvapor can pass from the pipe to the mouth of the smoker and means forholding the mouthpiece andbowl in proper relation.

In testimony whereof, I have hereunto set my hand this 11th day of July,1924.

LUDWIG STERN.

